Aqueous pigment preparations

ABSTRACT

The invention relates to aqueous pigment preparations containing (A) at least one organic and/or inorganic pigment, (B) a dispersant of formula (I) or (II), or mixtures of the dispersants of formulas (I) and (II), (C) optionally wetting agents, (D) optionally other surfactants and/or dispersants, (E) optionally one or more organic solvents or one or more hydrotropic substances, (F) optionally other additives used conventionally for the production of aqueous pigment dispersions and (G) water.

The present invention provides aqueous pigment preparations comprisingnovel nonionic polymers as dispersants and also their use for colorationof natural and synthetic materials.

Dispersing pigments in liquid media typically requires dispersants.Dispersants can be of anionic, cationic, amphoteric or neutralstructure. They can be of low molecular weight, or represent highmolecular weight polymers which constitute a random, alternating,blocklike, comblike or star-shaped architecture of the polymerizedmonomers.

Examples of where dispersants are of particular commercial importanceare the dispersing of pigments in the manufacture of pigmentconcentrates (used for coloration of emulsion and varnish colors,paints, coatings and printing inks) and also the coloration of paper,cardboard and textiles.

Pigment preparations comprising ordered polymeric structures are alsodescribed in the prior art. Examples thereof are EP 1 293 523, DE 102005 012 315 and EP 1 721 941.

However, the nonionic novolak dispersants used in the past have hithertonot been successfully replaced in terms of performance withoutdisadvantages having to be accepted in turn. The formerly customarynovolak dispersants contain as a consequence of their process ofproduction residues of alkylphenols, frequently nonylphenol, andethoxylates thereof. Since alkylphenol ethoxylates, or their degradationproducts, scarcely undergo any degradation in the environment, theybuild up. This is problematic in that they have a hormonal effect onaquatic organisms. Therefore, many countries have adopted legislation(2003/53/EC for example) which limits or bans the use of materialscontaining alkylphenols or their ethoxylates in open-loop systems.

Studies to date have shown that it is still extremely difficult tosynthesize dispersants that are equivalent to nonionic novolak systems.There is accordingly a need for novel dispersants that are capable ofdispersing organic pigments in high concentration above 40% tolow-viscosity dispersions. These dispersions shall be straightforward toproduce; i.e., the pigments shall be readily wetted and be readilyincorporated into the aqueous medium. The dispersion shall have a highand reproducible color strength that remains stable for a period ofseveral years. Similarly, all further coloristic parameters such as, forexample, hue angle and chroma shall be reproducible and stable. Thedispersion should not foam or cause or speed foaming in the applicationmedium. Furthermore, the dispersants should contribute to broadcompatibility of the dispersions in various application media. Moreover,the dispersion shall be shear stable; i.e., its color strength orcoloristics must not change significantly under shearing.

It has now been found that, surprisingly, specific nonionic copolymers,prepared by means of macromonomers composed ofpolyethylene/polypropylene glycol mono(meth)acrylic esters, achieve thestated object and equal nonionic novolak systems in their performance asdispersants.

The present invention provides aqueous pigment preparations comprising

-   (A) at least one organic and/or inorganic pigment,-   (B) a dispersant of formula (I) or (II) or mixtures of dispersants    of formulae (I) and (II),

where

-   the indices a, b and c indicate the molar fraction of the respective    monomers-   a=0.01-0.8-   b=0.001-0.8-   c=0.001-0.8-   provided the sum total of a+b+c is 1, and-   more preferably-   a=0.1-0.7-   b=0.1-0.6-   c=0.1-0.6-   provided the sum total of a+b+c is 1,-   A represents C₂-C₄-alkylene,-   B represents a C₂-C₄-alkylene other than A,-   R represents hydrogen or methyl,-   m is from 1 to 500, preferably from 1 to 50;-   n is from 1 to 500, preferably from 1 to 50;-   provided the sum total of m+n is from 2 to 1000;-   X_(a) represents an aromatic or araliphatic radical having 3 to 30    carbon atoms which optionally contains one or more of the hetero    atoms N, O and S,-   Z_(a) represents H or (C₁-C₄)-alkyl,-   Z_(b) represents H or (C₁-C₄)-alkyl,-   Z_(c) represents H or (C₁-C₄)-alkyl;-   R¹ represents hydrogen or methyl,-   X_(b) represents an aromatic or araliphatic radical having 3 to 30    carbon atoms which optionally contains one or more of the hetero    atoms N, O and S,-   W_(a) represents oxygen or an NH group,-   R² represents hydrogen or methyl,-   Y represents an aliphatic hydrocarbyl radical having 1 to 30 carbon    atoms, preferably 6 to 30, particularly 9 to 20 carbon atoms, which    may be linear or branched or else cyclic, and which may contain    hetero atoms O, N and/or S and may also be unsaturated,-   W_(b) represents oxygen or an NH group;-   (C) optionally wetters,-   (D) optionally further surfactants and/or dispersants,-   (E) optionally one or more organic solvents and/or one or more    hydrotropic substances,-   (F) optionally further additive materials customary for preparing    aqueous pigment dispersions, and-   (G) water.

Preferred pigment preparations comprise 5% to 80% by weight, for example10% to 70% by weight, of component (A).

Preferred pigments preparations comprise 0.1% to 30% by weight, forexample 2% to 15% by weight of component (B).

Particularly preferred pigment preparations comprise in terms ofcomponent

(A) 5% to 80% by weight, for example 10% to 70% by weight,

(B) 0.1% to 30% by weight, for example 2% to 15% by weight,

(C) 0% to 10% by weight, for example 0.1% to 5% by weight,

(D) 0% to 20% by weight, for example 1% to 10% by weight,

(E) 0% to 30% by weight, for example 5% to 20% by weight,

(F) 0% to 20% by weight, for example 0.1% to 5% by weight,

(G) balance water,

all based on the total weight (100% by weight) of the pigmentpreparation.

When one or more of components (C), (D), (E) and (F) are present, theirminimum concentrations independently of each other are preferably atleast 0.01% by weight and more preferably at least 0.1% by weight, basedon the total weight of the pigment preparation.

Component (A) in the pigment preparation of the present invention is afinely divided organic or inorganic pigment or a mixture of variousorganic and/or inorganic pigments. Component (A) can also be a dye thatis soluble in certain solvents and has pigment character in othersolvents. The pigments can be used not only in the form of dry powderbut also as water-moist presscake.

Useful organic pigments include monoazo, disazo, laked azo, β-naphthol,Naphthol AS, benzimidazolone, disazo condensation, azo metal complexpigments or polycyclic pigments such as, for example, thephthalocyanine, quinacridone, perylene, perinone, thioindigo,anthanthrone, anthraquinone, flavanthrone, indanthrone, isoviolanthrone,pyranthrone, dioxazine, quinophthalone, isoindolinone, isoindoline anddiketopyrrolopyrrole pigments or carbon blacks.

Of the organic pigments mentioned, those which are in a very fine stateof subdivision for producing the preparations are particularly suitable,and preferably 95% and more preferably 99% of the pigment particles havea particle size ≦500 nm.

An exemplary selection of particularly preferred organic pigmentsincludes carbon black pigments, for example lamp or furnace blacks;monoazo and disazo pigments, in particular the Colour Index pigmentsPigment Yellow 1, Pigment Yellow 3, Pigment Yellow 12, Pigment Yellow13, Pigment Yellow 14, Pigment Yellow 16, Pigment Yellow 17, PigmentYellow 73, Pigment Yellow 74, Pigment Yellow 81, Pigment Yellow 83,Pigment Yellow 87, Pigment Yellow 97, Pigment Yellow 111, Pigment Yellow126, Pigment Yellow 127, Pigment Yellow 128, Pigment Yellow 155, PigmentYellow 174, Pigment Yellow 176, Pigment Yellow 191, Pigment Yellow 213,Pigment Yellow 214, Pigment Yellow 219, Pigment Red 38, Pigment Red 144,Pigment Red 214, Pigment Red 242, Pigment Red 262, Pigment Red 266,Pigment Red 269, Pigment Red 274, Pigment Orange 13, Pigment Orange 34or Pigment Brown 41; β-naphthol and Naphthol AS pigments, in particularthe Colour Index pigments Pigment Red 2, Pigment Red 3, Pigment Red 4,Pigment Red 5, Pigment Red 9, Pigment Red 12, Pigment Red 14, PigmentRed 53:1, Pigment Red 112, Pigment Red 146, Pigment Red 147, Pigment Red170, Pigment Red 184, Pigment Red 187, Pigment Red 188, Pigment Red 210,Pigment Red 247, Pigment Red 253, Pigment Red 256, Pigment Orange 5,Pigment Orange 38 or Pigment Brown 1; laked azo and metal complexpigments, in particular the Colour Index pigments Pigment Red 48:2,Pigment Red 48:3, Pigment Red 48:4, Pigment Red 57:1, Pigment Red 257,Pigment Orange 68 or Pigment Orange 70; benzimidazoline pigments, inparticular the Colour Index pigments Pigment Yellow 120, Pigment Yellow151, Pigment Yellow 154, Pigment Yellow 175, Pigment Yellow 180, PigmentYellow 181, Pigment Yellow 194, Pigment Red 175, Pigment Red 176,Pigment Red 185, Pigment Red 208, Pigment Violet 32, Pigment Orange 36,Pigment Orange 62, Pigment Orange 72 or Pigment Brown 25; isoindolinoneand isoindoline pigments, in particular the Colour Index pigmentsPigment Yellow 139 or Pigment Yellow 173; phthalocyanine pigments, inparticular the Colour Index pigments Pigment Blue 15, Pigment Blue 15:1,Pigment Blue 15:2, Pigment Blue 15:3, Pigment Blue 15:4, Pigment Blue15:6, Pigment Blue 16, Pigment Green 7 or Pigment Green 36;anthanthrone, anthraquinone, quinacridone, dioxazine, indanthrone,perylene, perinone and thioindigo pigments, in particular the ColourIndex pigments Pigment Yellow 196, Pigment Red 122, Pigment Red 149,Pigment Red 168, Pigment Red 177, Pigment Red 179, Pigment Red 181,Pigment Red 207, Pigment Red 209, Pigment Red 263, Pigment Blue 60,Pigment Violet 19, Pigment Violet 23 or Pigment Orange 43;triarylcarbonium pigments, in particular the Colour Index pigmentsPigment Red 169, Pigment Blue 56 or Pigment Blue 61;diketopyrrolopyrrole pigments, in particular the Colour Index pigmentsPigment Red 254, Pigment Red 255, Pigment Red 264, Pigment Red 270,Pigment Red 272, Pigment Orange 71, Pigment Orange 73, Pigment Orange81.

Laked dyes such as calcium, magnesium and aluminum lakes of sulfonatedand/or carboxylated dyes are also suitable.

Suitable inorganic pigments include for example titanium dioxides, zincsulfides, zinc oxides, iron oxides, magnetites, manganese iron oxides,chromium oxides, ultramarine, nickel or chromium antimony titaniumoxides, manganese titanium rutiles, cobalt oxides, mixed oxides ofcobalt and of aluminum, rutile mixed phase pigments, sulfides of therare earths, spinels of cobalt with nickel and zinc, spinels based oniron and chromium with copper zinc and also manganese, bismuth vanadatesand also blend pigments. The Colour Index pigments Pigment Yellow 184,Pigment Yellow 53, Pigment Yellow 42, Pigment Yellow Brown 24, PigmentRed 101, Pigment Blue 28, Pigment Blue 36, Pigment Green 50, PigmentGreen 17, Pigment Black 11, Pigment Black 33 and also Pigment White 6are used in particular. Preference is frequently also given to usingmixtures of inorganic pigments. Mixtures of organic with inorganicpigments are likewise often used.

Instead of pigment dispersions it is also possible to preparedispersions of solids including for example natural finely divided ores,minerals, sparingly soluble or insoluble salts, particles of wax orplastic, dyes, crop protection and pest control agents, UV absorbers,optical brighteners and polymerization stabilizers.

Component (B) comprises novel specific nonionic copolymers being used asdispersants. These copolymers have a molecular weight of 10³ g/mol to10⁹ g/mol, more preferably of 10³ to 10⁷ g/mol and even more preferably10³ to 10⁵ g/mol.

These polymers are prepared by free-radical polymerization of monomerscorresponding to the radicals in formula (I) or (II) which are describedin the parentheses [ ]_(c), [ ]_(b) and [ ]_(a).

The method of preparation is described in German patent application DE10 2007 021 868.

In one preferred embodiment, (A-O)_(m) represents propylene oxide unitsand (B—O)_(n) represents ethylene oxide units, or (A-O)_(m) representsethylene oxide units and (B—O)_(n) represents propylene oxide units, andthe molar fraction of ethylene oxide units is in the range frompreferably 50 to 98%, more preferably 60 to 95%, even more preferably 70to 95%, based on the sum total of ethylene oxide and propylene oxideunits.

The sum total of the alkylene oxide units can in principle be n+m=2 to1000, although 2 to 500 is preferred, 2 to 100 is particularly preferredand 5 to 100 is even more particularly preferred.

It is an essential property of the polymers according to the presentinvention that their polyalkylene glycol side chains are not purelypolyethylene glycols or polypropylene glycols. Rather, the polyalkyleneglycols are either random or blocklike polyalkylene glycols composed ofpropylene oxide and ethylene oxide units. It is only the fine-tuning ofthis EO/PO ratio that provides polymeric dispersants useful forpreparing highly concentrated pigment dispersions of low viscosity. Theoptimized ratios for the EO/PO fraction in the monomer [ ]_(a) incombination with the aromatic and aliphatic monomers [ ]_(b) and [ ]_(c)makes it possible to emulate the properties of novolak-type dispersantssuch that a very similar performance profile is obtained.

The monomers of group [ ]_(b) include for example the following estersand amides of acrylic acid and methacrylic acid: phenyl, benzyl, tolyl,2-phenoxyethyl, phenethyl. Possible monomers further includevinylaromatic monomers such as styrene and its derivatives, such asvinyltoluene and α-methylstyrene for example. The aromatic unit may alsocomprise heteroaromatics, as in 1-vinylimidazole for example.

Particularly preferred monomers of group [ ]_(b) can be: styrene,1-vinylimidazole, benzyl methacrylate, 2-phenoxyethyl methacrylate andphenethyl methacrylate.

The monomers of group [ ]_(c) include for example the following estersand amides of acrylic acid and methacrylic acid: methyl, ethyl, propyl,isopropyl, n-butyl, isobutyl, t-butyl, pentyl, hexyl, 2-ethylhexyl,3,3-dimethylbutyl, heptyl, octyl, isooctyl, nonyl, lauryl, cetyl,stearyl, behenyl, cyclohexyl, trimethylcyclohexyl, t-butylcyclohexyl,bornyl, isobornyl, adamantyl, (2,2-dimethyl-1-methyl)propyl,cyclopentyl, 4-ethyl-cyclohexyl, 2-ethoxyethyl, tetrahydrofurfuryl andtetrahydropyranyl.

Preferred monomers of [ ]_(c) are the following alkyl esters andalkylamides of acrylic acid and methacrylic acid: methyl, ethyl, propyl,butyl, isobutyl, 2-ethoxyethyl, myristyl, octadecyl, more preferably2-ethylhexyl and lauryl.

Component (C) comprises for example cationic, anionic, amphoteric ornonionic compounds which enhance pigment wetting (wetting agents,wetters).

Component (D) in the pigment preparations of the present inventioncomprises customary dispersants and surfactants useful for preparingaqueous pigment dispersions, or mixtures thereof. Anionic, cationic,amphoteric or nonionic surface-active compounds are typically used forthis purpose. Among these are dispersants having one or moremedium-length or long hydrocarbyl chains, in some instances also thosehaving aromatic ring groups, that will be found particularly useful. Ofthe multiplicity of compounds only a selection will be recited here,without the utility of compounds according to the present inventionbeing limited to these examples. Examples are alkyl sulfates such as,for example lauryl sulfate, stearyl sulfate or octadecyl sulfate,primary alkyl sulfonates such as, for example, dodecyl sulfonate, andsecondary alkyl sulfonates, particularly the C₁₃-C₁₇ alkanesulfonatesodium salt, alkyl phosphates, alkylbenzenesulfonates such as, forexample, dodecylbenzenesulfonic acid, similarly all salts thereof. Alsouseful are soy lecithin and condensation products of fatty acid andtaurine or hydroxyethanesulfonic acid, similarly alkoxylation productsof alkylphenols, castor oil rasin esters, fatty alcohols, fatty amines,fatty acids and fatty acid amides, which alkoxylation products cansimilarly be equipped with ionic end groups, for example in the form ofsulfosuccinic monoesters or else as sulfonic, sulfuric and phosphoricesters, and also salts thereof, the sulfonates, sulfates or phosphates.Alkoxylated addition compounds obtained by reaction of polyepoxides withamines or bisphenol-A or bisphenol-A derivatives with amines are alsosuitable, as are similarly urea derivatives.

Similarly suitable are nonionic alkoxylated styrene phenol condensatesobtained by addition of optionally substituted styrenes onto optionallysubstituted phenols and reaction with ethylene oxide and/or propyleneoxide, similarly ionically modified derivatives thereof, for example assulfonic, sulfuric and phosphoric esters, and also salts thereof, thesulfonates, sulfates or phosphates. Useful surface-active compoundsfurther include lignosulfonates and polycondensates ofnaphthalinesulfonic acid and formaldehyde, or else of alkylarylsulfonicacids, haloarylsulfonic acid, sulfonated phenols or sulfonated naphtholswith formaldehyde.

Component (E) comprises organic solvents or water-soluble hydrotropicsubstances. Hydrotropic compounds, which also serve as a solvent, ifappropriate, or are oligomeric or polymeric in nature are for exampleformamide, urea, tetra-methylurea, ε-caprolactam, ethylene glycol,propylene glycol, diethylene glycol, triethylene glycol, polyethyleneglycol, α-methyl ω-hydroxy polyethylene glycol ether, dimethylpolyethylene glycol ether, dipropylene glycol, polypropylene glycol,dimethyl polypropylene glycol ether, copolymers of ethylene glycol andpropylene glycol, butyl glycol, methylcellulose, glycerol, diglycerol,polyglycerol, N-methyl-pyrrolidone, 1,3-diethyl-2-imidazolidinone,thiodiglycol, sodium benzenesulfonate, sodium xylenesulfonate, sodiumtoluenesulfonate, sodium cumenesulfonate, sodium dodecylsulfonate,sodium benzoate, sodium salicylate, sodium butyl monoglycol sulfate,cellulose derivatives, gelatin derivatives, polyvinylpyrrolidone,polyvinyl alcohol, polyvinylimidazole and co- and terpolymers ofvinylpyrrolidone, vinyl acetate and vinylimidazole. Polymers comprisingvinyl acetate building blocks may subsequently be saponified to thevinyl alcohol.

Component (F) comprises for example thickeners, preservatives, viscositystabilizers, grinding assistants and fillers. Further customaryadditives are antisettling agents, photoprotectants, antioxidants,degassers/defilmers, foam-reducing agents, anitcaking agents and alsoviscosity and rheology improvers. Useful viscosity regulators includefor example polyvinyl alcohol and cellulose derivatives. Water-solublenatural or manufactured resins and also polymers may similarly beincluded as filming or binding agents to enhance bonding strength andabrasion resistance. Useful pH regulators include organic or inorganicbases and acids. Preferred organic bases are amines, for exampleethanolamine, diethanolamine, triethanolamine, N,N-dimethylethanolamine,diisopropylamine, aminomethylpropanol or dimethylaminomethylpropanol.Preferred inorganic bases are sodium hydroxide, potassium hydroxide,lithium hydroxide or ammonia.

Component (F) further comprises fats and oils of vegetable and animalorigin, for example beef tallow, palm kernel fat, coconut fat, rapeseedoil, sunflower oil, linseed oil, palm oil, soy oil, groundnut oil andwhale oil, cotton seed oil, maize oil, poppy seed oil, olive oil, castoroil, colza oil, safflower oil, soybean oil, thistle oil, sunflower oil,herring oil, sardine oil. Common additives also include saturated andunsaturated higher fatty acids, for example palmitic acid, cyprylicacid, capric acid, myristic acid, lauryl acid, stearic acid, oleic acid,linoleic acid, linolenic acid, caproic acid, caprylic acid, arachidicacid, behenic acid, palmitoleic acid, gadoleic acid, erucic acid andricinoleic acid, and also salts thereof.

Water used as component (G) to produce the pigment preparations ispreferably used in the form of demineralized or distilled water. It issimilarly possible to use drinking water (tap water) and/or water ofnatural origin.

The present invention also provides a process for producing the pigmentpreparations of the present invention, which process comprisesdispersing said component (A) in the form of powder, granulate oraqueous presscake in the presence of water (G) and also said components(B) and optionally (C) and (D), then optionally admixing water (G) andalso optionally one or more of said components (E) and (F) andoptionally diluting the resulting aqueous pigment dispersion with water(G). Said components (B) and optionally one or more of said components(C), (D), (E) and (F) are preferably initially mixed and homogenized,then said component (A) is stirred into the initially charged mixture,said component (A) being incipiently pasted and predispersed. Thepredispersion is subsequently, depending on the texture of component(A), finely dispersed or finely dissipated, with or without cooling,using a grinding or dispersing assembly. Such may include stirrers,dissolvers (sawtooth stirrers), rotor-stator mills, ball mills, stirredmedia mills such as sand and bead mills, high speed mixers, kneaders,roll stands or high performance bead mills. The fine dispersing orgrinding of component (A) is carried on to the desired particle sizedistribution and can take place at temperatures in the range from 0 to100° C., advantageously at a temperature between 10 and 70° C.,preferably at 20 to 60° C. Following the fine-dispersing operation, thepigment preparation may be further diluted with water (G), preferablydeionized or distilled water.

The pigment preparations of the present invention are useful forpigmentation and coloration of natural and synthetic materials of anykind, particularly of aqueous paints, emulsion and varnish colors(emulsion varnishes). The pigment preparations of the present inventionare further useful for coloration of macro-molecular materials of anykind, for example of natural and synthetic fiber materials, preferablycellulose fibers, also for paper pulp coloration and laminatecoloration. Further uses are the production of printing colors, forexample textile printing colors, flexographic printing inks or intaglioprinting inks, wallpaper colors, water-thinnable coatings, woodpreservation systems, viscose dope dyeing systems, varnishes, includingpowder coatings, sausage casings, seed, fertilizers, glass, particularlyglass bottles, and also of mass coloration of roof shingles, forcoloration of renders, concrete, wood stains, colored pencil leads, felttip pens, waxes, paraffins, graphics inks ball point pen pastes, chalks,washing and cleaning compositions, shoe care agents, latex products,abrasives, and also for coloration of plastics or high molecular weightmaterials of any kind. Examples of high molecular weight organicmaterials are cellulose ethers and esters, such as ethylcellulose,nitrocellulose, cellulose acetate or cellulose butyrate, natural resinsor synthetic resins, such as addition polymerization resins orcondensation resins, for example amino resins, particularly urea- andmelamine-formaldehyde resins, alkyd resins, acrylic resins, phenolicresins, polycarbonates, polyolefins, such as polystyrene, polyvinylchloride, polyethylene, polypropylene, polyacrylonitrile, polyacrylicesters, polyamides, polyurethanes or polyesters, rubber, casein,lattices, silicone, silicone resins, individually or in admixture.

The pigment preparations of the present invention are further useful forproducing liquid printing inks for use in all conventional ink-jetprinters, particularly for those based on the bubble jet or piezoprocess. These liquid printing inks can be used to print paper and alsonatural or synthetic fiber materials, foils and plastics. Additionally,the pigment preparation of the present invention can be used forprinting various kinds of coated or uncoated substrate materials, forexample for printing paper board, cardboard, wood and woodbasematerials, metallic materials, semiconductor materials, ceramicmaterials, glasses, glass and ceramic fibers, inorganic materials ofconstruction, concrete, leather, comestibles, cosmetics, skin and hair.The substrate material may be two-dimensionally planar or spatiallyextended, i.e., three-dimensionally configured, and may be printed orcoated completely or only in parts.

The pigment preparations of the present invention are also useful as acolorant in electrophotographic toners and developers, for example inone- or two-component powder toners (also called one- or two-componentdevelopers), magnet toners, liquid toners, latex toners, polymerizationtoners and also specialty toners. Typical toner binders in this contextare addition polymerization resins, polyaddition resins andpolycondensation resins, such as styrene, styrene-acrylate,styrene-butadiene, acrylate, polyester, phenol-epoxy resins,polysulfones, polyurethanes, individually or in combination, and alsopolyethylene and polypropylene, which may each contain furtheringredients, such as charge control agents, waxes or flow assistants, orare subsequently modified with these adjuvants.

The pigment preparations of the present invention are also useful as acolorant in liquid inks, preferably ink-jet inks, for example aqueous ornonaqueous (solvent based), microemulsion inks, UV-curable inks, andalso in such inks that operate according to the hot melt process.

The pigment preparations of the present invention can also be used ascolorants for color filters for flat panels displays, not only foradditive but also for subtractive color production, also forphotoresists and also as colorants for “electronic inks” or “e-inks” or“electronic paper” or “e-paper”.

EXAMPLES Preparation of Dispersants (B) Synthesis Example 1

A flask equipped with stirrer, reflux condenser, internal thermometerand nitrogen inlet was initially charged with 258 g of polyalkyleneglycol monomethacrylate (molar mass 750, molar EO/PO ratio 6.3), 136.4 gof 2-ethylhexyl methacrylate, 71.6 g of styrene and 16.5 g of1-dodecanethiol in 660 ml of tertiary butanol under nitrogen. Then, theinitial charge was heated to 80° C. with stirring. On attainment of thereaction temperature 16.5 g of AMBN initiator, dissolved in 130 mlisobutanol, were added during 1 hour. This was followed by a further 5hours of stirring at that temperature. After cooling to roomtemperature, the solvent was removed in vacuo.

The following synthesis examples were carried out similarly to synthesisexample 1 using the following starting materials:

Synthesis Example 2

210 g of polyalkylene glycol monomethacrylate (molar mass 350, molarEO/PO ratio 1.7), 79.2 g of 2-ethylhexyl methacrylate, 41.6 g ofstyrene.

Synthesis Example 3

258 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 87.5 g of lauryl methacrylate, 35.8 g of styrene.

Synthesis Example 4

210 g of polyalkylene glycol monomethacrylate (molar mass 350, molarEO/PO ratio 1.7), 101.6 g of lauryl methacrylate, 41.6 g of styrene.

Synthesis Example 5

363 g of polyalkylene glycol monomethacrylate (molar mass 1100, molarEO/PO ratio 10.2, 70% in t-butanol), 117.3 g of lauryl methacrylate,48.0 g of styrene.

Synthesis Example 6

452 g of polyalkylene glycol monomethacrylate (molar mass 2000, molarEO/PO ratio 20.5, 70% in t-butanol), 80.4 g of lauryl methacrylate, 32.9g of styrene.

Synthesis Example 7

210 g of polyalkylene glycol monomethacrylate (molar mass 300, molarEO/PO ratio 1.7), 202.8 g of stearyl methacrylate, 62.4 g of styrene.

Synthesis Example 8

258 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 38.2 g of isobornyl methacrylate, 30.3 g of benzylmethacrylate.

Synthesis Example 9

363 g of polyalkylene glycol monomethacrylate (molar mass 1100, molarEO/PO ratio 10.2, 70% in t-butanol), 39.3 g of tetrahydrofurfurylmethacrylate, 87.8 g of phenethyl methacrylate.

Synthesis Example 10

452 g of polyalkylene glycol monomethacrylate (molar mass 2000, molarEO/PO ratio 20.5, 70% in t-butanol), 25.0 g of 2-ethoxyethylmethacrylate, 29.7 g of 1-vinylimidazole.

Synthesis Example 11

210 g of polyalkylene glycol monomethacrylate (molar mass 300, molarEO/PO ratio 1.7), 69.0 g of lauryl acrylate, 52.8 g of benzylmethacrylate.

Synthesis Example 12

258 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 38.2 g of 1-vinyl-2-pyrrolidone, 107.3 g of styrene.

Synthesis Example 13

452 g of polyalkylene glycol monomethacrylate (molar mass 2000, molarEO/PO ratio 20.5, 70% in t-butanol), 31.3 g of 2-ethylhexylmethacrylate, 27.8 g of benzyl methacrylate.

Synthesis Example 14

363 g of polyalkylene glycol monomethacrylate (molar mass 1100, molarEO/PO ratio 10.2, 70% in t-butanol), 58.7 g of lauryl methacrylate, 43.9g of phenethyl methacrylate.

Synthesis Example 15

258 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 116.3 g of stearyl methacrylate, 70.9 g of2-phenoxyethyl methacrylate.

Synthesis Example 16

210 g of polyalkylene glycol monomethacrylate (molar mass 350, molarEO/PO ratio 0.43), 72.0 g of lauryl acrylate, 52.8 g of benzylmethacrylate.

Synthesis Example 17

258 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 0.22), 87.5 g of lauryl methacrylate, 35.8 g of styrene.

Synthesis Example 18

363 g of polyalkylene glycol monomethacrylate (molar mass 1100, molarEO/PO ratio 0.30, 70% in t-butanol), 58.7 g of lauryl methacrylate, 43.9g of phenethyl methacrylate.

Synthesis Example 19

388 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 68.2 g of 2-ethylhexyl methacrylate, 35.8 g ofstyrene.

Synthesis Example 20

517 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 68.2 g of 2-ethylhexyl methacrylate, 35.8 g ofstyrene.

Synthesis Example 21

280 g of polyalkylene glycol monomethacrylate (molar mass 350, molarEO/PO ratio 1.7), 79.2 g of 2-ethylhexyl methacrylate, 41.6 g ofstyrene.

Synthesis Example 22

387 g of polyalkylene glycol monomethacrylate (molar mass 750, molarEO/PO ratio 6.3), 87.5 g of lauryl methacrylate, 35.8 g of styrene.

Synthesis Example 23

267 g of polyalkylene glycol monomethacrylate (molar mass 350, molarEO/PO ratio 1.7), 101.6 g of lauryl methacrylate, 41.6 g of styrene.

Comparative Synthesis Example 1 Copolymer According to DE 10 2005 019384, Example 1

A 1-liter three-neck flask equipped with a thermometer, a nitrogen portand also an intensive condenser was used to dissolve 291.8 g of styrene,603.3 g of methacrylic acid and also 209.8 g of methoxy polyethyleneglycol methacrylate (1000 g/mol) (MPEG 1000 MA) (50% in water) intetrahydrofuran with stirring. Then, 30.2 g of dibenzoyl peroxide (75%in water) were added and the contents of the flask were conditioned at65° C. under a gentle stream of nitrogen. The mixture was heated underreflux for 18 hours. Thereafter, it was cooled down to about roomtemperature. With vigorous stirring, 73.75 g of solid NaOH and also 1.25L of deionized water were added a little at a time. After the contentsof the flask had dissolved again, tetrahydrofuran, water and unconvertedstyrene were distilled off under reduced pressure. The pressure waschosen such that the temperature of the mixture did not exceed 40° C.The concentrated polymer solution was adjusted with water to a solidscontent of approximately 33% by weight.

Production of a Pigment Preparation:

The pigment, in the form alternatively of powder, granulate orpresscake, was pasted up in deionized water together with thedispersants and the other adjuvants and then homogenized andpredispersed using a dissolver (for example from VMA-Getzmann GmbH, typeAE3-M1) or some other suitable apparatus. Fine dispersion wassubsequently effected using a bead mill (for example AE3-M1 fromVMA-Getzmann) or else some other suitable dispersing assembly, withmilling being carried out with siliquartzite beads or zirconium mixedoxide beads of size d=1 mm, accompanied by cooling, until the desiredcolor strength and coloristics were obtained. Thereafter, the dispersionwas adjusted with deionized water to the desired final pigmentconcentration, the grinding media separated off and the pigmentpreparation isolated.

The pigment preparations described in the examples which follow wereproduced by the method described above, the following constituents beingused in the stated amounts so as to produce 100 parts of the respectivepigment preparation. Parts are by weight in the examples below.

Evaluation of a Pigment Preparation

Color strength and hue were determined in accordance with DIN 55986. Therub-out test was carried out by applying the emulsion paint or thevarnish, after mixing with the pigment dispersion, to a paint card.Subsequently, the applied coating was rubbed with the finger on thelower part of the paint card. Incompatibility was present if the rubbedarea is then more strongly or brightly colored than the adjacent areanot aftertreated (the rub-out test is described in DE 2 638 946). Colorstrength and compatibilities with media to be colored were determinedusing 6 different white dispersions:

-   1. White dispersion A (for exteriors, waterborne, 20% TiO₂)-   2. White dispersion B (for exteriors, waterborne, 13.4% TiO₂)-   3. White dispersion C (for exteriors, waterborne, 22.6% TiO₂)-   4. White dispersion D (for exteriors, waterborne, binder    polysiloxane emulsion, TiO₂, talc, calcium carbonate)-   5. White dispersion E (for interiors, waterborne, polymer    dispersion, free of solvent and plasticizers, low in emissions,    TiO₂, calcium carbonate)-   6. White dispersion F (for interiors, waterborne, polyacrylates,    TiO₂, calcium carbonate)

Viscosity was determined using a cone-and-plate viscometer (RotoVisco 1) from Haake at 20° C. (titanium cone: Ø60 mm, 1°), therelationship between viscosity and shear rate in a range between 0 and200 s⁻¹ being investigated. Viscosities were measured at a shear rate of60 s⁻¹.

To evaluate the storage stability of the dispersions, viscosity wasmeasured directly after production of the preparation and also afterfour weeks' storage at 50° C.

Shear stability and foam behavior were observed after using acommercially available kitchen blender (Braun MX 32) set to a high speedof rotation to shear a preparation which had been diluted to 2%. Thegreater the shear stability of the preparation, the smaller the drop incolor strength after shearing compared with the color strength of asheared dispersion to an unsheared dispersion. Foam behavior wasobserved after the blender was switched off.

The pigment preparations described in the examples which follow wereproduced by the method described above, the following constituents beingused in the stated amounts such that 100 parts of the respective pigmentpreparation are formed. Parts are by weight in the examples below.

Example 1

50.0 parts  of component (A), C.I. Pigment Blue 15 7.0 parts ofcomponent (B), dispersant as per synthesis example 19 2.0 parts ofcomponent (C), wetter 8.0 parts of component (E), ethylene glycol 0.2part  of component (F), preservative Balance of component (G), water

The pigment preparation has a consistently high color strength and isstable. In all 6 white dispersions A to F it can be incorporated verywell, with ready dispersibility. The rub-out test in all cases shows nodifferences in color strength in comparison between the rubbed area andthe unrubbed area. The preparation proves to be readily flowable andstorage stable since it is still very readily flowable after 28 days'storage at 50° C. Viscosity in the as-produced state is 642 mPa·s. Thepreparation is shear stable and does not foam.

Example 2

45.0 parts of component (A), C.I. Pigment Red 112  8.0 parts ofcomponent (B), dispersant as per synthesis example 23 1.0 part ofcomponent (C), wetter 10.0 parts of component (E), propylene glycol 0.2part of component (F), preservative Balance of component (G), water

The pigment preparation has a consistently high color strength and isstable. In all 6 white dispersions it can be incorporated very well,with ready dispersibility. The rub-out test in the six cases shows nodifferences in color strength in comparison between the rubbed area andthe unrubbed area. The preparation proves to be readily flowable andstorage stable since it is still very readily flowable after 28 days'storage at 50° C. Viscosity in the as-produced state is 278 mPa·s. Thepreparation is shear stable and does not foam.

Example 3

65.0 parts of component (A), C.I. Pigment Yellow 42  4.0 parts ofcomponent (B), dispersant as per synthesis example 11 1.0 part ofcomponent (C), wetter 15.0 parts of component (E), propylene glycol 0.2part of component (F), preservative Balance of component (G), water

The pigment preparation has a consistently high color strength and isstable. In 5 white dispersions, it can be incorporated very well withready dispersibility; incorporability is more difficult in the 6th whitedispersion but still achievable with a homogeneous result. The rub-outtest in the six cases shows no differences in color strength incomparison between the rubbed area and the unrubbed area. Thepreparation proves to be readily flowable and storage stable since it isstill very readily flowable after 28 days' storage at 50° C. Viscosityin the as-produced state is 1765 mPa·s. The preparation is shear stableand does not foam.

Example 4

40.0 parts of component (A), C.I. Pigment Red 168 12.0 parts ofcomponent (B), dispersant conforming to formula (II), synthesis example18 20.0 parts of component (E), ethylene glycol 0.2 part of component(F), preservative Balance of component (G), water

The pigment preparation has a consistently high color strength and isstable. In all 6 white dispersions it can be incorporated very well,with ready dispersibility. The rub-out test in the six cases shows nodifferences in color strength in comparison between the rubbed area andthe unrubbed area. The preparation proves to be readily flowable andstorage stable since it is still very readily flowable after 28 days'storage at 50° C. Viscosity in the as-produced state is 894 mPa·s. Thepreparation is shear stable and does not foam.

Example 5

40.0 parts of component (A), C.I. Pigment Black 7  6.5 parts ofcomponent (B), dispersant as per synthesis example 21 Balance ofcomponent (G), water

The pigment preparation has a consistently high color strength and isstable. In all 6 white dispersions it can be incorporated very well,with ready dispersibility. The rub-out test in the six cases shows nodifferences in color strength in comparison between the rubbed area andthe unrubbed area. The preparation proves to be readily flowable andstorage stable since it is still very readily flowable after 28 days'storage at 50° C. Viscosity in the as-produced state is 483 mPa·s. Thepreparation is shear stable and does not foam.

Example 6

50.0 parts of component (A), C.I. Pigment Green 7  7.5 parts ofcomponent (B), dispersant as per synthesis example 2 15.0 parts ofcomponent (E), propylene glycol 0.2 part of component (F), preservativeBalance of component (G), water

The pigment preparation has a consistently high color strength and isflocculation stable. In all 6 white dispersions it can be incorporatedvery well, with ready dispersibility. The rub-out test in the six casesshows no differences in color strength in comparison between the rubbedarea and the unrubbed area. The preparation proves to be readilyflowable and storage stable since it is still very readily flowableafter 28 days' storage at 50° C. Viscosity in the as-produced state is669 mPa·s. The preparation is shear stable and does not foam.

Comparative Example

45.0 parts component (A), C.I. Pigment Rot 112  8.0 parts component (B),dispersant based on comparative synthesis example 1  1.3 parts component(C), wetter 10.0 parts component (E), propylene glycol 0.2 partcomponent (F), preservative 35.5 parts component (G), water

The pigment preparation only has a high color strength in whitedispersions A, B, C, E. In white dispersions D and F, color strength is85% and 90%, respectively. Systems D and F exhibit a marked rub-out;there is a slight rub-out observable in B. The dispersion is notsufficiently storage stable since it was found to have solidified after28 days' storage at 50° C.

Further examples relating to pigment preparations are given in the tablewhich follows. In each case, a 40% pigment preparation is produced onthe basis of Pigment Yellow 83 in accordance with the following recipe:

40.0 parts of component (A), C.I. Pigment Yellow 83 10.0 parts ofcomponent (B), dispersant conforming to formula (I) or (II), from thesynthesis example reported in the table 1.0 part of component (C),wetter 10.0 parts of component (E), propylene glycol 0.2 part ofcomponent (F), preservative Balance of component (G), water

The letters A to F indicate the designation of the white dispersion inwhich testing was carried out. FS stands for color strength.

Synthesis example Viscosity as Storage No. A B C D E F producedstability 1 FS 103%, FS 100%, FS 106%, FS 104%, FS 110%, FS 98%, 467mPas very no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no no rub-out, no good flocculation flocculationflocculation no flocculation flocculation flocculation 2 FS 104%, FS101%, FS 99%, FS 105%, FS 100%, FS 101%, 988 mPas good no rub-out, no norub-out, no no rub-out, no minimal rub-out, no rub-out, no no rub-out,no flocculation flocculation flocculation no flocculation flocculationflocculation 3 FS 100%, FS 99%, FS 99%, FS 105%, FS 105%, FS 102%, 165mPas very no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no minimal rub-out, good flocculation flocculationflocculation no flocculation flocculation very minimal flocculation 4 FS101%, FS 101%, FS 101%, FS 101%, FS 101%, FS 101%, 535 mPas very norub-out, no no rub-out, no no rub-out, no minimal rub-out, no rub-out,no no rub-out, no good flocculation flocculation flocculation noflocculation flocculation flocculation 5 FS 102%, FS 105%, FS 100%, FS105%, FS 110%, FS 102%, 624 mPas very no rub-out, no no rub-out, no norub-out, no minimal rub-out, no rub-out, no no rub-out, no goodflocculation flocculation flocculation minimal flocculation flocculationflocculation 6 FS 105%, FS 102%, FS 103%, FS 99%, FS 99%, FS 104%, 836mPas good no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no no rub-out, flocculation flocculation flocculation noflocculation flocculation no flocculation 7 FS 102%, FS 102%, FS 110%,FS 105%, FS 102%, FS 99%, 349 mPas very no rub-out, no no rub-out, no norub-out, no minimal rub-out, no rub-out, no no rub-out, goodflocculation flocculation flocculation minimal flocculation noflocculation flocculation 8 FS 98%, FS 104%, FS 99%, FS 106%, FS 100%,FS 104%, 571 mPas very no rub-out, no no rub-out, no no rub-out, nominimal rub-out, no rub-out, no no rub-out, good flocculationflocculation flocculation no flocculation flocculation no flocculation 9FS 105%, FS 95%, FS 103%, FS 108%, FS 105%, FS 97%, 605 mPas very norub-out, no no rub-out, no no rub-out, no minimal rub-out, no rub-out,no no rub-out, no good flocculation flocculation flocculation minimalflocculation flocculation flocculation 10 FS 101%, FS 101%, FS 101%, FS101%, FS 101%, FS 101%, 467 mPas very no rub-out, no no rub-out, no norub-out, no no rub-out, no no rub-out, no no rub-out, no goodflocculation flocculation flocculation flocculation flocculationflocculation 11 FS 102%, FS 104%, FS 99%, FS 97%, FS 99%, FS 103%, 735mPas good no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no no rub-out, no flocculation flocculation flocculation noflocculation flocculation flocculation 12 FS 103%, FS 104%, FS 102%, FS99%, FS 102%, FS 106%, 367 mPas very no rub-out, no no rub-out, no norub-out, no minimal rub-out, no rub-out, no no rub-out, no goodflocculation flocculation flocculation no flocculation flocculationflocculation 13 FS 96%, FS 99%, FS 98%, FS 94%, FS 103%, FS 100%, 565mPas very no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no no rub-out, no good flocculation flocculationflocculation no flocculation flocculation flocculation 14 FS 99%, FS101%, FS 103%, FS 100%, FS 101%, FS 97%, 625 mPas very no rub-out, no norub-out, no no rub-out, no no rub-out, no no rub-out, no no rub-out, nogood flocculation flocculation flocculation flocculation flocculationflocculation 15 FS 105%, FS 104%, FS 100%, FS 99%, FS 98%, FS 101%, 1169mPas  very no rub-out, no no rub-out, no no rub-out, no minimal rub-out,no rub-out, no no rub-out, no good flocculation flocculationflocculation no flocculation flocculation flocculation 16 FS 99%, FS99%, FS 101%, FS 104%, FS 109%, FS 100%, 564 mPas  good no rub-out, nono rub-out, no no rub-out, no minimal rub-out, no rub-out, no norub-out, no flocculation flocculation flocculation minimal flocculationflocculation flocculation 17 FS 105%, FS 110%, FS 102%, FS 100%, FS105%, FS 108%, 238 mPas very no rub-out, no no rub-out, no no rub-out,no minimal rub-out, no rub-out, no no rub-out, no good flocculationflocculation flocculation no flocculation flocculation flocculation 18FS 103%, FS 102%, FS 105%, FS 110%, FS 103%, FS 95%, 649 mPas very norub-out, no no rub-out, no no rub-out, no minimal rub-out, no rub-out,no no rub-out, no good flocculation flocculation flocculation noflocculation flocculation flocculation 19 FS 102%, FS 105%, FS 106%, FS99%, FS 97%, FS 104%, 877 mPas good no rub-out, no no rub-out, no norub-out, no minimal rub-out, no rub-out, no no rub-out, no enoughflocculation flocculation flocculation no flocculation flocculationflocculation 20 FS 100%, FS 100%, FS 101%, FS 104%, FS 101%, FS 102%,313 mPas very no rub-out, no no rub-out, no no rub-out, no minimalrub-out, no rub-out, no no rub-out, no good flocculation flocculationflocculation no flocculation flocculation flocculation 21 FS 104%, FS101%, FS 98%, FS 95%, FS 102%, FS 106%, 622 mPas very no rub-out, no norub-out, no no rub-out, no minimal rub-out, no rub-out, no no rub-out,no good flocculation flocculation flocculation no flocculationflocculation flocculation 22 FS 103%, FS 108%, FS 99%, FS 98%, FS 101%,FS 111%, 269 mPas good no rub-out, no no rub-out, no no rub-out, no norub-out, no no rub-out, no minimal rub-out, flocculation flocculationflocculation flocculation flocculation minimal flocculation 23 FS 99%,FS 97%, FS 100%, FS 101%, FS 105%, FS 102%, 411 mPas very no rub-out, nono rub-out, no no rub-out, no minimal rub-out, no rub-out, no norub-out, no good flocculation flocculation flocculation no flocculationflocculation flocculation

1. An aqueous pigment preparation comprising (A) at least one organicpigment, inorganic pigment or a combination thereof, (B) a dispersant offormula (I) or (II) or mixtures of dispersants of formulae (I) and (II),

wherein the indices a, b and c indicate the molar fraction of therespective monomers a=0.01-0.8 b=0.001-0.8 c=0.001-0.8 provided the sumtotal of a+b+c is 1, and A is C₂-C₄-alkylene, B is a C₂-C₄-alkyleneother than A, R is hydrogen or methyl, m is from 1 to 500; n is from 1to 500; provided the sum total of m+n is from 2 to 1000; X¹ is anaromatic or araliphatic radical having 3 to 30 carbon atoms optionallycontaining one or more of the hetero atoms N, O and S, Z¹ is H or(C₁-C₄)-alkyl, Z² is H or (C₁-C₄)-alkyl, Z³ is H or (C₁-C₄)-alkyl; R¹ ishydrogen or methyl, X² is an aromatic or araliphatic radical having 3 to30 carbon atoms optionally containing one or more of the heteroatoms N,O and S, W¹ is oxygen or an NH group, R² is hydrogen or methyl, Y is analiphatic hydrocarbyl radical having 1 to 30 carbon atoms, optionallylinear, branched or cyclic, and optionally contains hetero atoms O, N Sor a combination thereof and optionally is unsaturated, W² is oxygen oran NH group; (C) optionally wetters, (D) optionally further surfactants,dispersants or a combination thereof, (E) optionally one or more organicsolvents, one or more hydrotropic substances or a combination thereof,(F) optionally further additive materials customary for preparingaqueous pigment dispersions, and (G) water.
 2. The pigment preparationas claimed in claim 1, comprising 5% to 80% by weight of said component(A).
 3. The pigment preparation as claimed in claim 1, comprising 0.1%to 30% by weight of said component (B).
 4. The pigment preparation asclaimed in claim 1, wherein the following composition of said components(A) to (G) is: (A) 5% to 80% by weight, (B) 0.1% to 30% by weight, (C)0% to 10% by weight, (D) 0% to 20% by weight, (E) 0% to 30% by weight,(F) 0% to 20% by weight, (G) balance water, all based on the totalweight of said pigment preparation.
 5. The pigment preparation asclaimed in claim 1, wherein the following composition of said components(A) to (G) is: (A) 10% to 70% by weight, (B) 2% to 15% by weight, (C)0.1% to 5% by weight, (D) 1% to 10% by weight, (E) 5% to 20% by weight,(F) 0.1% to 5% by weight, (G) balance water, all based on the totalweight of said pigment preparation.
 6. The pigment preparation asclaimed in claim 1, wherein the organic pigment of said component (A) isa monoazo, disazo, laked azo, β-naphthol, Naphthol AS, benzimidazolone,disazo condensation, azo metal complex pigment, carbon black or apolycyclic pigment selected from the group consisting of phthalocyanine,quinacridone, perylene, perinone, thioindigo, anthanthrone,anthraquinone, flavanthrone, indanthrone, isoviolanthrone, pyranthrone,dioxazine, quinophthalone, isoindolinone, isoindoline anddiketopyrrolopyrrole pigments.
 7. The pigment preparation as claimed inclaim 1, wherein the alkylene oxide units (A-O)_(m) and (B—O)_(n) arearranged in blocks in said component (B).
 8. The pigment preparation asclaimed in claim 1, wherein, in said component (B), (A-O)_(m) arepropylene oxide units and (B—O)_(n) are ethylene oxide units, or(A-O)_(m) are ethylene oxide units and (B—O)_(n) are propylene oxideunits, and the molar fraction of ethylene oxide units is in the rangefrom 50 to 98%, based on the sum total of ethylene oxide and propyleneoxide units.
 9. A process for producing a pigment preparation as claimedin claim 1, comprising the step of dispersing said component (A) in theform of powder, granulate or aqueous presscake in the presence of water(G) and said components (B) and optionally (C) and (D), optionallyadmixing water (G) and also optionally one or more of said components(E) and (F) and optionally diluting the resulting aqueous pigmentdispersion with water (G); or said components (B) are initially mixedand homogenized with one or more of said components (C), (D), (E) and(F) to form a mixture, stirring said component (A) into the initiallycharged mixture, said component (A) being incipiently pasted andpredispersed.
 10. A pigmented natural or synthetic material pigmented bya pigment preparation as claimed in claim
 1. 11. A composition pigmentedby a pigment preparation as claimed in claim 1, wherein the compositionis selected from the group consisting of aqueous paints, emulsioncolors, varnish colors, water-thinnable varnishes, wallpaper colors andprinting inks.
 12. A composition or article pigmented by a pigmentpreparation as claimed in claim 1, wherein the composition or article isselected from the group consisting of cellulose fibers, paper pulpcoloration, laminate coloration printing inks, ink-jet inks,electrophotographic toners, powder coatings, color filters, electronicinks and electronic paper, color filters, wood preservation systems,viscose dope dyeing, sausage casings, seed, fertilizers, glass bottles,roof shingles, renders, concrete, wood stains, colored pencil leads,felt tip pens, waxes, paraffins, graphics inks, ballpoint pen pastes,chalks, washing compositions, cleaning compositions, shoe care agents,latex products, abrasives, and plastics.